:root {
    /* Light theme colors (base colors) */
    --bg: #eae7e7;
    --surface: #e6e0e0;
    --text: #2d2d2d;
    --text-secondary: #595959;
    --accent: #b76e79;
    --accent-hover: #9a5961;

    /* Dark theme colors */
    --dark-bg: #1a1a1a;
    --dark-surface: #2a2a2a;
    --dark-text: #e2e8f0;
    --dark-text-secondary: #94a3b8;
    --dark-accent: #cf838e;
    --dark-accent-hover: #c88891;

    /* Common colors */
    --tag-bg: rgba(183, 110, 121, 0.08);
    --tag-bg-dark: rgba(183, 110, 121, 0.1);
}

#particles-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    opacity: 0.4;
}

/* Theme Classes */
.theme-text {
    color: var(--text);
    transition: color 0.3s ease-in-out;
}

body.dark-theme .theme-text {
    color: var(--dark-text);
}

.theme-text-secondary {
    color: var(--text-secondary);
    transition: color 0.3s ease-in-out;
}

body.dark-theme .theme-text-secondary {
    color: var(--dark-text-secondary);
}

.theme-bg {
    background-color: var(--bg);
    transition: background-color 0.3s ease-in-out;
}

body.dark-theme .theme-bg {
    background-color: var(--dark-bg);
}

.theme-surface {
    background-color: var(--surface);
    transition: background-color 0.3s ease-in-out;
}

body.dark-theme .theme-surface {
    background-color: var(--dark-surface);
}

/* Base Styles */
body {
    background-color: var(--bg);
    color: var(--text-secondary);
    font-family: system-ui, -apple-system, sans-serif;
    transition: none;
    /* Magnetic Scroll */
    scroll-snap-type: y proximity;
    /* proximity is smoother than mandatory for varied content heights */
    scroll-behavior: smooth;
    height: 100vh;
    overflow-y: auto;
}

body.theme-loaded {
    transition: background-color 0.3s ease-in-out, color 0.3s ease-in-out;
}

body.dark-theme {
    background-color: var(--dark-bg);
    color: var(--dark-text-secondary);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text);
    font-weight: 600;
    transition: color 0.3s ease-in-out;
}

body.dark-theme h1,
body.dark-theme h2,
body.dark-theme h3,
body.dark-theme h4,
body.dark-theme h5,
body.dark-theme h6 {
    color: var(--dark-text);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease-in-out;
}

a:hover {
    color: var(--accent);
}

body.dark-theme a:hover {
    color: var(--dark-accent);
}

/* Layout */
.section {
    margin-bottom: 4rem;
    scroll-margin-top: 6rem;
    /* Adjust for fixed header */
    scroll-snap-align: start;
}

@media (min-width: 768px) {
    .section {
        margin-bottom: 6rem;
    }
}

@media (min-width: 1024px) {
    .section {
        margin-bottom: 9rem;
        scroll-margin-top: 6rem;
    }
}

/* Social Links */
.social-link {
    color: var(--text-secondary);
    transition: color 0.3s ease-in-out;
}

body.dark-theme .social-link {
    color: var(--dark-text-secondary);
}

.social-link:hover {
    color: var(--text);
}

body.dark-theme .social-link:hover {
    color: var(--dark-text);
}

/* Navigation */
.nav {
    display: block;
}

.nav-text {
    color: var(--text-secondary);
    transition: color 0.3s ease-in-out;
    position: relative;
    display: inline-block;
}

body.dark-theme .nav-text {
    color: var(--dark-text-secondary);
}

.nav a:hover .nav-text {
    color: var(--accent);
}

body.dark-theme .nav a:hover .nav-text {
    color: var(--dark-accent);
}

/* Fixed Navigation Bar */
.fixed-nav {
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

body.dark-theme .fixed-nav {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Back to Portfolio Link */
.back-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0;
    color: var(--text-secondary);
    transition: color 0.3s ease-in-out;
}

body.dark-theme .back-link {
    color: var(--dark-text-secondary);
}

.back-link:hover {
    color: var(--accent);
    text-decoration: none;
}

body.dark-theme .back-link:hover {
    color: var(--dark-accent);
}

/* Theme toggle button */
.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 9999px;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease-in-out;
    z-index: 50;
    background-color: var(--surface);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

body.dark-theme .theme-toggle {
    background-color: var(--dark-surface);
    box-shadow: none;
}

.theme-toggle:hover {
    transform: scale(1.05);
    background-color: var(--accent);
}

body.dark-theme .theme-toggle:hover {
    background-color: var(--dark-accent);
}

.theme-toggle svg {
    width: 1.25rem;
    height: 1.25rem;
    color: var(--text);
    transition: color 0.3s ease-in-out;
}

body.dark-theme .theme-toggle svg {
    color: var(--dark-text);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

body.dark-theme ::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--surface);
    border-radius: 5px;
}

body.dark-theme ::-webkit-scrollbar-thumb {
    background: var(--dark-surface);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

body.dark-theme ::-webkit-scrollbar-thumb:hover {
    background: var(--dark-accent);
}

/* Skill Tags */
.skill-tag {
    background-color: var(--tag-bg);
    color: var(--accent);
    transition: background-color 0.3s ease-in-out, color 0.3s ease-in-out;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
    display: flex;
    align-items: center;
}

body.dark-theme .skill-tag {
    background-color: var(--tag-bg-dark);
    color: var(--dark-accent);
}

/* Base paper venue tag style */
.paper-venue-tag {
    background-color: rgba(124, 58, 237, 0.08);
    color: #7c3aed;
    transition: all 0.3s ease-in-out;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    text-align: center;
    line-height: 1.2;
}

body.dark-theme .paper-venue-tag {
    background-color: rgba(124, 58, 237, 0.1);
    color: #a581fa;
}

.paper-venue-tag.first-author {
    border: 1px solid #7c3aed;
    background-color: rgba(124, 58, 237, 0.08);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

body.dark-theme .paper-venue-tag.first-author {
    border: 1px solid #8b5cf6;
    background-color: rgba(124, 58, 237, 0.1);
}

/* For inline first author mentions */
.first-author {
    border-bottom: 1px solid currentColor;
    padding-bottom: 1px;
}

/* Award tag styles */
/* Award tag styles */
.award-tag {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.1), rgba(255, 165, 0, 0.1));
    color: #b45309;
    /* Darker gold/orange for readability */
    border: 1px solid rgba(255, 215, 0, 0.3);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

body.dark-theme .award-tag {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15), rgba(255, 165, 0, 0.15));
    color: #fbbf24;
    /* Lighter gold for dark mode */
    border-color: rgba(255, 215, 0, 0.4);
}

.award-tag:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(255, 165, 0, 0.1), 0 2px 4px -1px rgba(255, 165, 0, 0.06);
    border-color: rgba(255, 215, 0, 0.6);
}

.award-icon {
    width: 1em;
    height: 1em;
    fill: currentColor;
}

/* Section Headers */
.section-heading {
    font-size: 1rem !important;
    color: var(--accent) !important;
    position: relative;
    display: inline-block;
    padding-bottom: 0.25rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 0.1em;
}

body.dark-theme .section-heading {
    color: var(--dark-accent) !important;
}

/* View All Button */
.view-all-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    background-color: var(--bg);
    color: var(--accent);
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.3s ease-in-out;
}

body.dark-theme .view-all-button {
    background-color: var(--dark-bg);
    color: var(--dark-accent);
}

.view-all-button:hover {
    background-color: rgba(174, 15, 39, 0.08);
    color: var(--accent);
    transform: translateY(-1px);
}

body.dark-theme .view-all-button:hover {
    background-color: rgba(183, 140, 146, 0.1);
    color: var(--dark-accent);
}

.view-all-button svg {
    width: 1.25rem;
    height: 1.25rem;
    transition: transform 0.2s ease-in-out;
}

.view-all-button:hover svg {
    transform: translateX(4px);
}

/* Content Overlays */
.content-overlay {
    background-color: rgba(234, 231, 231, 0.85);
    backdrop-filter: blur(4px);
    transition: background-color 0.3s ease-in-out;
}

body.dark-theme .content-overlay {
    background-color: rgba(26, 26, 26, 0.85);
}

.header-overlay {
    background-color: rgba(234, 231, 231, 0.95);
    backdrop-filter: blur(4px);
    transition: background-color 0.3s ease-in-out;
}

body.dark-theme .header-overlay {
    background-color: rgba(26, 26, 26, 0.95);
}

/* About Card */
.about-card {
    position: relative;
    padding: 2rem;
    background-color: rgba(230, 224, 224, 0.85) !important;
    border-radius: 0.5rem;
    transition: all 0.3s ease-in-out;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05),
        0 2px 4px -1px rgba(0, 0, 0, 0.03);
    overflow: hidden;
    backdrop-filter: blur(4px);
}

body.dark-theme .about-card {
    background-color: rgba(42, 42, 42, 0.85) !important;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
        0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* Card hover effects */
@media (min-width: 1024px) {
    .group:hover .absolute {
        background-color: rgba(230, 224, 224, 0.85) !important;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    }

    body.dark-theme .group:hover .absolute {
        background-color: var(--dark-surface) !important;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    }
}

/* Static Border Effect */
.about-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: var(--accent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

body.dark-theme .about-card::before {
    background: var(--dark-accent);
}

/* Dynamic Border Light Effect */
.about-card::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(var(--angle, 90deg),
            transparent,
            var(--accent) var(--distance, 100%),
            transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

body.dark-theme .about-card::after {
    background: linear-gradient(var(--angle, 90deg),
            transparent,
            var(--dark-accent) var(--distance, 100%),
            transparent);
}

/* Additional hover effects for about-card */
.about-card:hover {
    transform: translateY(-2px);
}

.about-card:hover::before {
    opacity: 0.4;
}

.about-card:hover::after {
    opacity: 0.8;
}

/* Additional shadow on hover */
.about-card:hover {
    box-shadow: 0 8px 12px -1px rgba(0, 0, 0, 0.08),
        0 4px 8px -1px rgba(0, 0, 0, 0.05);
}

body.dark-theme .about-card:hover {
    box-shadow: 0 8px 12px -1px rgba(0, 0, 0, 0.2),
        0 4px 8px -1px rgba(0, 0, 0, 0.1);
}

.highlight {
    background: rgba(104, 175, 110, 0.08);
    /* Soft sage background */
    border-radius: 2px;
    padding: 0.1em 0.2em;
    color: #558f5c;
    /* Sage text */
}

body.dark-theme .highlight {
    background: rgba(104, 175, 110, 0.1);
    color: #75bf7c;
    /* Lighter sage for dark theme */
}

.hiring-tag {
    background-color: rgba(183, 110, 121, 0.12);
    /* Slightly more opaque version of your accent color */
    color: var(--accent);
    padding: 0.3rem 1.25rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--accent);
}

body.dark-theme .hiring-tag {
    background-color: rgba(207, 131, 142, 0.12);
    color: var(--dark-accent);
    border-color: var(--dark-accent);
}

/* Gold Text Shine Animation */
@keyframes gold-shine {
    0% {
        background-position: -100% 50%;
    }

    100% {
        background-position: 200% 50%;
    }
}

.gold-text-shine {
    position: relative;
    display: inline-block;
    /* Ensures proper positioning */
}

.gold-text-shine::after {
    content: attr(data-text);
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;

    background-size: 200% auto;
    color: transparent;
    -webkit-background-clip: text;
    background-clip: text;

    animation: gold-shine 2.5s ease-in-out forwards;
}

/* Light Theme Gradient: Transparent -> Gold -> Transparent */
.gold-text-shine::after {
    background-image: linear-gradient(120deg,
            transparent 0%,
            transparent 30%,
            #a07c26 40%,
            #ffd700 48%,
            #ffffff 50%,
            #ffd700 52%,
            #a07c26 60%,
            transparent 70%,
            transparent 100%);
}

/* Dark Theme Gradient: Transparent -> Gold -> Transparent */
body.dark-theme .gold-text-shine::after {
    background-image: linear-gradient(120deg,
            transparent 0%,
            transparent 30%,
            #fde68a 40%,
            #fbbf24 48%,
            #ffffff 50%,
            #fbbf24 52%,
            #fde68a 60%,
            transparent 70%,
            transparent 100%);
}

/* Twinkle Star Animation */
.twinkle-star {
    position: absolute;
    width: 16px;
    height: 16px;
    background: #FFD700;
    clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
    animation: twinkle-fade 0.8s ease-in-out forwards;
    pointer-events: none;
    z-index: 50;
    box-shadow: 0 0 4px rgba(255, 215, 0, 0.8);
}

@keyframes twinkle-fade {
    0% {
        transform: scale(0) rotate(0deg);
        opacity: 0;
    }

    50% {
        transform: scale(1) rotate(180deg);
        opacity: 1;
    }

    100% {
        transform: scale(0) rotate(360deg);
        opacity: 0;
    }
}

/* Shimmer/Slash Animation Effect */
@keyframes shimmer-slash {
    0% {
        transform: translateX(-150%) skewX(-20deg);
    }

    100% {
        transform: translateX(150%) skewX(-20deg);
    }
}

.shimmer-effect {
    position: relative;
    overflow: hidden;
}

.shimmer-effect::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right,
            transparent 0%,
            rgba(255, 215, 0, 0.1) 30%,
            rgba(255, 215, 0, 0.4) 50%,
            rgba(255, 215, 0, 0.1) 70%,
            transparent 100%);
    transform: translateX(-150%) skewX(-20deg);
    pointer-events: none;
    z-index: 10;
}

.shimmer-effect.animate::before {
    animation: shimmer-slash 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark mode adjustment for shimmer */
body.dark-theme .shimmer-effect::before {
    background: linear-gradient(to right,
            transparent 0%,
            rgba(255, 215, 0, 0.05) 30%,
            rgba(255, 215, 0, 0.2) 50%,
            rgba(255, 215, 0, 0.05) 70%,
            transparent 100%);
}